Slow HTTP - The Insidious Killer

Slow HTTP are application layer Denial Of Service (DoS) attacks and have a potential to knock down a server with limited resources. Because of the nature of the attack (slow speed and low volume), they are hard to detect and...

How 'ls' command output caused a downtime on prod

ls is one of the innocuous commands that sysadmins probably use hundreds of times a day. But yesterday, we faced downtime on production because of the output of this command. Here’s the full story… One of our production app server...

Null HUMLA Write-up

Last week I got a chance to attend my first Null HUMLA workshop. People who are not familiar with Null, it is a community of security enthusiasts who are willing to share knowledge and trying to make the world a...

My Internship At Kayako

This post was originally posted on Medium as a part of life at Kayako series. This summer I got the opportunity to do an internship as a Product Engineer at Kayako. I was fresh out of college and looking for...

HackIM 2016 write-up (Prog and Crypto)

The HackIM 2016 edition has just concluded. Programming questions were pretty straight forward and didn’t require much programming skills. Let’s have a look at them: Programming 1 So you reached Delhi and now the noise in your head is not...